How many valence electrons does an atom of this element have : 2e-8e-8e2e?

True or false reactants are located on the right side of a chemical equation?

A. List three things that your body strives to keep constant. (example metabolism) B. Describe one way in which each of the items you listed in Part A could be at least temporarily disrupted from equilibrium.

Which of the following is the first step toward proposing solutions effectively? a. Determine the desired outcome. b. Propose a possible solution. c. Act on a possible solution. d. Identify the unresolved problem or dilemma.

Jordan wonders why there is dew on the grass in the morning. He asks a few friends to see what they think. His friend Tasha says that there is dew on the grass because it always rains at night. Did Jordan find a scientific answer?

Which of the following is a disadvantage of nuclear power? A. The cost of operating and maintaining the plants is very high. B. Radioactive waste is dangerous. C. Meltdowns occur frequently. D. It is a large contributor to global warming.

How much MnO2 (s) should be added to excess HCl (aq) to obtain 295 mL of Cl2 (g) at 25 °C and 735 Torr?

Why do people describe water as a universal solvent

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?

For the complete combustion of 5.6dm3 of a gaseuos hydrocarbon CxHy. 28.0dm3 of oxygen gas were used, 16.8dm3 of CO2 gas and 18.0gof liquid water were produced all gases measurement were made at stp. Determine the chemical formula of the hydrocarbon